Area Forecast Discussion
Issued by NWS Sterling, VA

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KLWX 261825 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 225 PM EDT Sun Mar 26 2017 .SYNOPSIS...
-- Changed Discussion --
A front will remain stationary across the area through this evening then return as a warm front late tonight and Monday. Another cold front will cross the area late Tuesday. High pressure will build over the region Thursday.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
Moisture convergence will increase across the southwest and west with rain/showers moving into areas west of the Blue Ridge early this evening and east of the Blue Ridge overnight as warm lifts north into Pennsylvania. Areas of fog are also possible. Warm front clears the area by daybreak Mon if not sooner.
-- End Changed Discussion --
&& .SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/...
-- Changed Discussion --
Low clouds will erode during the morning with breaks in the clouds expected in the afternoon. A weak convergence zone will exist/remain and combined with some instability could be enough for scattered showers. Better forcing and moisture spreads across the area late Mon night and Tue with approach of low pressure and associated cdfnt for better coverage of showers and thunderstorms.
-- End Changed Discussion --
&& .LONG TERM /WEDNESDAY THROUGH SUNDAY/...
-- Changed Discussion --
Long term period starts dry as high pressure builds over our region Wednesday into Thursday with high temperatures in the 50s and 60s. Conditions will deteriorate Thursday night into Friday as a low pressure system tracks east-northeast from Missouri to near Lake Erie. Its associated warm front will stay south of the Mid-Atlantic into Friday before lifting Friday night. Low pressure develops near or off of the Delmarva Peninsula Friday night into Saturday as unsettled conditions continue over our region. Conditions improve during the day on Saturday as low pressure moves away from the coast. Dry conditions continue into Sunday.
-- End Changed Discussion --
&& .AVIATION /18Z SUNDAY THROUGH FRIDAY/...
-- Changed Discussion --
IFR conditions tonight with cigs/vsbys improving to MVFR/VFR Mon. Chance of rain is greatest after midnight at main terminals. Showers and possible t-storms expected again on Tue. Dry/VFR conditions expected for Wednesday and Thursday before rain approaches the area Thursday night, possibly bringing sub- VFR conditions over the terminals into Friday.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
Winds are not doing much right now so cancelled SCA. However, winds are expected to increase again across the southern waters late tonight so issue SCA for southern waters. Dry conditions expected for Wednesday and Thursday before rain approaches the area Thursday night, bringing showers over the waters into Friday. Wind gusts will be near the small craft advisory threshold during parts of this period... therefore SCA possible at times.
-- End Changed Discussion --
&& .LWX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
DC...None. MD...None. VA...None. WV...None. MARINE...Small Craft Advisory from 11 PM this evening to 6 PM EDT Monday for ANZ533-534-537-541>543.
-- End Changed Discussion --
&& $$ SYNOPSIS...LFR NEAR TERM...LFR SHORT TERM...LFR LONG TERM...IMR AVIATION...IMR/LFR MARINE...IMR/LFR

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.